Heat stroke and sunstroke

This code signifies a severe, life-threatening form of hyperthermia resulting from prolonged exposure to high temperatures, leading to thermoregulatory failure. It is characterized by a core body temperature exceeding 104°F (40°C) and central nervous system dysfunction, such as altered mental status, seizures, or coma.

Apply this code when documentation clearly indicates a patient presenting with symptoms consistent with heat stroke, including significantly elevated body temperature and neurological impairment, following exposure to excessive heat. This diagnosis is typically made in emergency department settings or during hospital admissions for acute heat-related illness.

• Differentiate from less severe heat-related illnesses like heat exhaustion or heat cramps, which have distinct codes.
• Ensure documentation specifies the severity and presence of CNS involvement to support this diagnosis.
• Consider external cause codes (E-codes) to identify the circumstances of the heat exposure, if applicable.